Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 26 for “"Duckweed"”.
-
Optimization of the production of bioethanol from duckweed (Lemna minor)
… investigated the production of bioethanol from duckweed (Lemna minor) biomass. The project includes four main sections: firstly, analysis of the chemical characteristics of duckweed, particularly the polysaccharides of the cell wall; secondly, exploration of suitable commercial enzymes for …
-
Evaluation of the microbial risks associated with duckweed cultivation on agro-industrial wastewaters
… on imported soy protein in several countries. Duckweed species are free floating freshwater plants belonging to the family Lemnaceae. These plants can be found worldwide and are characterized by high growth rates and high protein content (up to 35% per unit dry weight). In addition, these …
-
Composition, Biomass, and Protein Content of a Lemna trisulca L., Invertebrate Community in a Prairie Wetland
Samples of star duckweed (Lemna trisulca L.) were collected from a South Dakota prairie wetland during the summer 1981. Amphipods and gastropods were the dominant macroinvertebrates found within samples of duckweed in terms of biomass and density. Cladocera were the dominant microinvertebrates …
-
Exploring the potential of duckweed (Lemnaceae) as a circular protein crop on agri-food industry wastewaters
… and providing alternative sources of protein. Duckweeds are small floating aquatic plants known for their rapid growth and high dry weight protein content. Duckweed cultivation on agri-food wastewaters offers a potential solution for their valorisation through simultaneous phytoremediation and …
-
Preference and Performance of the Water Lily Aphid (Rhopalosiphum Nymphaeae) among Native and Invasive Duckweeds (Lemnaceae)
… water lily aphid on three different species of duckweed, including one invasive duckweed. Aphid preference was determined through a series of choice tests, which showed that the aphids preferred Spirodela polyrhiza over Landoltia punctata over Lemna minor. Water lily aphids also initially …
-
Birth order as a source of diversification in spring phenology and its potential effects on performance in greater duckweed, Spirodela polyrhiza
… populations of Spirodela polyrhiza (greater duckweed) provide an excellent case study of phenotypic diversification as a risk aversion strategy. Previous research on this species has demonstrated that potential diversification bet hedging in the phenology of the production of turions is …
-
Waste remediation and value creation: the recovery of nutrients from dairy industry wastewater using the aquatic plant Lemna minor
… in this thesis using aquatic Lemnaceae, i.e. duckweed. Accordingly, environmentally polluting compounds, such as N and P, are removed from the wastewater by plant action and in duckweed a valuable biomass is created which can be used as a feed or biofuel. In general, it was found that dairy …
-
Comparative studies on the modes of action of SC-0224 and glyphosate
… of the SC-0224 molecular structure. In inflated duckweed (Lemna gibba L.), both formulated and technical grade forms of SC-0224 were found to be much more phytotoxic to duckweed than either formulated or technical grade forms of glyphosate. The growth inhibition caused by glyphosate was partially …
-
Phosphorus fate and management on the Somerset Levels and Moors Ramsar ditch systems
… submerged aquatic vegetation to algae or duckweed dominance, leading to excessive shading and anoxic conditions. Phosphorus, from both point (e.g., wastewater treatment works) and diffuse (largely agricultural runoff) sources, is currently the central reason for failure in the majority of …
-
Laboratory scale aerobic bioreactor conditioning of dairy processing wastewater as feedstock for Lemna minor production
… Future work with coupled wastewater treatment/duckweed cultivation systems should also involve investigation into plant-symbiont interactions, as well as profiling of wastewater microbial communities and their potential impacts on duckweed growth.
-
Toxicity of manufactured nano-ZnO to Lemna minor
… using the aquatic, primary producer lesser duckweed (Lemna minor), and the mechanism of toxicity was analysed. Both short-term (one week) and long-term (six weeks) toxicity of nano-ZnO (uncoated) were determined. Results show that the toxicity of nano-ZnO added to the aquatic growth medium …
-
Examining the Impact of Mercury on Waterfowl with Implications for Human Health and Water Management in Arid Environments
… sampling occasions, increases in water and duckweed [Hg] were observed. Based on observed [Hg] measurements, important vectors of Hg to wood ducks occur through duckweed consumption and exposure to contaminated waters. Mercury concentrations in wood duck tissues indicate a consumption …
-
Análise proteômica de Lemnaceae associada à produção de biomassa e bioenergia
Lentilhas-d’água ou duckweed, em inglês, são pequenas macrófitas aquáticas, consideradas como as menores angiospermas conhecidas, agrupadas na família Lemnaceae. Estas plantas apresentam capacidade natural de se adaptar e colonizar água residual antropogênica, reciclando diversos poluentes e …
-
Analysis of nature-based treatment of surface water runoff from an informal settlement to irrigate vegetables
… system mirroring each other: 1) control soil, 2) duckweed-treated soil, and 3) biochar-treated soil. Bulbous (belowground) and leafy (aboveground) crops were selected for the experiment. Following each successive harvest during the experimental period, soil samples from a depth of 10 cm were …
-
Evaluating methiozolin programs for golf putting greens and investigating potential modes of action
… symptoms of methiozolin exposure in lesser duckweed, a model monocot species, but feeding various turfgrass species and annual bluegrass exogenous 4-HPP did not alleviate symptoms. Creeping bentgrass secondary root length and density was not affected by methiozolin, although annual …
Page 1 of 2